The Downtown Parking Authority of Tampa, Florida, reported thefollowing information for a sample of 220 customers on the numberof hours cars are parked and the amount they are charged.
| Number of Hours | | Frequency | | Amount Charged |
| 1 | | 15 | | $ | 2 |
| 2 | | 36 | | | 6 |
| 3 | | 53 | | | 9 |
| 4 | | 40 | | | 13 |
| 5 | | 20 | | | 14 |
| 6 | | 11 | | | 16 |
| 7 | | 9 | | | 18 |
| 8 | | 36 | | | 22 |
| | 220 | | | |
a-1. Convert the information on the number ofhours parked to a probability distribution. (Round youranswers to 3 decimal places.) Find the mean and the standard deviation of the number of hoursparked. (Do not round the intermediate calculations. Roundyour final answers to 3 decimal places.) How long is a typical customer parked? (Do not round theintermediate calculations. Round your final answer to 3 decimalplaces.) Find the mean and the standard deviation of the amount charged.(Do not round the intermediate calculations. Round yourfinal answers to 3 decimal places.)
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